It's from Amazon:

Sunnyglade ABS Plastic Dustproof Waterproof IP65 Junction Box Universal Durable Electrical Project Enclosure With Lock (3.9"x7.9"x2.8") https://www.amazon.com/dp/B07PWD6QPX/ref=cm_sw_r_cp_api_glt_fabc_RV1XBYDBYWM4NF9P9NNQ?_encoding=UTF8&psc=1